Muriel GUGGER obtained her Ph.D. in 2001 from the University Paris VII, France, based on her studies on toxic planktonic cyanobacteria, under the Co-direction of Pr. Kaarina SIVONEN from Helsinki University and of Pr. Alain COUTE from MNHN Paris. After two post-docs in Luxembourg and in France where she investigated the diversity and evolution of the branching cyanobacteria and the toxic bloom-forming species and their cyanotoxins, notably on neurotoxin dog poisonings, she worked shortly as Project Manager on wastewater management. In 2007, Muriel joined the lab of Dr Nicole TANDEAU DE MARSAC at the Institut Pasteur as Adjunct Curator of the collection the Pasteur Culture of Cyanobacteria (PCC) to work with Rosi RIPPKA. This led to her current position as Head of the Collection of Cyanobacteria at the Institut Pasteur since July 2009. Her main interests are the evolution of the cyanobacterial phylum and the diversity of the genes involved in the synthesis of cyanotoxins and natural products in Cyanobacteria, on which she published 40 research papers, 3 reviews and 5 book chapters and one patent.